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Old 11-22-2010, 02:48 PM
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just a quick question

hey all just a quick question i have a 69 pontiac 400 would it be feesable to have it punched out .60 or even.80 over and if so would i need a stroker kit?
thanks in advance you guys rock

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Old 11-22-2010, 04:33 PM
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Wow, boring and stroking have nothing to do with each other. If you want to bore it, go .030 over, this way if you need to bore it again there is still some cylinder wall left. I don't know how much over you can go with these blocks but i wouldn't go more than .030 to begin with.
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Old 11-22-2010, 04:37 PM
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Quote:
Originally Posted by mark44667
hey all just a quick question i have a 69 pontiac 400 would it be feesable to have it punched out .60 or even.80 over and if so would i need a stroker kit?
thanks in advance you guys rock
Feesable for what? You could probably get away with an over bore of .060", but to be sure, I'd have it sonic checked, and boring doesn't require stroking.
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Old 11-22-2010, 04:43 PM
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IMO the 400 is a flawed design and alot of people had trouble with them. Boring it out much only makes it worse. I think .060 is too much but thats just me. I think id step up to an aluminum headed big block before id mess with a 400. There is a reason the 400 SBC was not made very long in comparison to all the other small blocks. I think it had a 9 year run from 71 to 80 if i remember right and there weren't that many of them used. I hardly ever run across one.

This is all my opinion of course, and I am not much of a small block fan to begin with so take it as you will.
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Old 11-22-2010, 04:50 PM
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Quote:
Originally Posted by Torque454
IMO the 400 is a flawed design and alot of people had trouble with them. Boring it out much only makes it worse. I think .060 is too much but thats just me. I think id step up to an aluminum headed big block before id mess with a 400. There is a reason the 400 SBC was not made very long in comparison to all the other small blocks. I think it had a 9 year run from 71 to 80 if i remember right and there weren't that many of them used. I hardly ever run across one.

This is all my opinion of course, and I am not much of a small block fan to begin with so take it as you will.
Dude, he's talking about a 400 PONTIAC, which are pretty darn good engines.

And by the way ONE THOUSAND!!!!!!!!!!!!!!!!!
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Old 11-22-2010, 04:52 PM
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Quote:
Originally Posted by Torque454
IMO the 400 is a flawed design and alot of people had trouble with them. Boring it out much only makes it worse. I think .060 is too much but thats just me. I think id step up to an aluminum headed big block before id mess with a 400. There is a reason the 400 SBC was not made very long in comparison to all the other small blocks. I think it had a 9 year run from 71 to 80 if i remember right and there weren't that many of them used. I hardly ever run across one.

This is all my opinion of course, and I am not much of a small block fan to begin with so take it as you will.
The SBC 400 is as good as whoever builds it.

Siamesed cylinders are often cited as being "bad" for one reason or another. BS. GM, MOPAR and FoMoCo ALL use siamesed blocks in their HiPo applications.
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Old 11-22-2010, 04:53 PM
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Haha, shows how close i was paying attention huh. When i see talk of a 400 i automatically assume 400 SBC. I dont know much about Pontiac.
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Old 11-22-2010, 04:55 PM
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Originally Posted by cobalt327
The SBC 400 is as good as whoever builds it.
I dont have much faith in anything built or rebuilt these days. Seems like nothing ever lasts as long as it did when it was new.

Freggin' Chinese metal and outsourced production....
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Old 11-22-2010, 05:00 PM
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Quote:
Originally Posted by Torque454
I dont have much faith in anything built or rebuilt these days. Seems like nothing ever lasts as long as it did when it was new.

Freggin' Chinese metal and outsourced production....
The OEM blocks all have too thin decks- and the SBC 400 engines are among them- probably their biggest 'fault'.

Even the LS series have their weak points. Part of the mass produced, planned obsolescence world we live in.
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Old 11-22-2010, 05:05 PM
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Sorry didn't mean to sound like an idiot i have rebuilt engines in the past but never had any major mods done to one
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Old 11-22-2010, 05:12 PM
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Quote:
Originally Posted by mark44667
hey all just a quick question i have a 69 pontiac 400 would it be feesable to have it punched out .60 or even.80 over and if so would i need a stroker kit?
thanks in advance you guys rock
So, what's this engine in or intended for? You going to drive it on the street?
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Old 11-22-2010, 05:14 PM
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it's going in a 72 olds cutlass with a 700r4 and 3.08 differential gears and yes it is going to be driven on the street my son and i are restoring it thought it would be a cool father son project

Last edited by mark44667; 11-22-2010 at 05:28 PM.
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Old 11-22-2010, 05:34 PM
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Quote:
Originally Posted by mark44667
it's going in a 72 olds cutlass with a 700r4 and 3.08 differential gears and yes it is going to be driven on the street my son and i are restoring it thought it would be a cool father son project
That sounds like a cool project. Keep us posted.

BTW, there's a Project Journal and Photo Gallery available to members, click on them at the top of the page if you want to start either one up, once the project gets underway.

And welcome aboard!
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Old 11-22-2010, 05:35 PM
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thank you all very much for you help
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Old 11-22-2010, 05:57 PM
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Mark, You have a PM.

Bill
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